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在相邻条石板板缝间嵌埋CFRP筋并填入高强粘结材料,形成了一种新型的组合石板构件。开展了包含三板两缝的组合石板的受弯性能试验,研究了试件的破坏形态、受弯承载力、变形性能、石材及CFRP筋应变分布。试验结果表明,开裂前各条石板与CFRP筋及嵌缝材料变形一致,协同工作性能良好;达到开裂弯矩后,各条石板在跨中同一位置逐次开裂;开裂后由CFRP筋和嵌缝材料组成的增强带有效防止了石板的塌落。基于试验结果,分析了组合石板开裂前后的不同受力机制。研究成果可为新型组合石板的进一步研究及既有石板楼盖的鉴定加固提供参考。
Embedding CFRP bars between adjacent slates and filling high-strength bonding materials forms a new type of composite slab component. The bending behavior of composite slate with three plates and two slits was studied. The failure morphology, flexural capacity, deformation performance and strain distribution of stone and CFRP tendons were studied. The test results show that, before cracking, the deformation of all the slabs and CFRP tendons and caulking materials is consistent and the working performance is good. After the cracking moment is reached, the slate slabs are cracked one by one at the same position in the span; after cracking, the CFRP tendons and caulking materials Reinforced with the composition effectively prevent the slump of stone. Based on the test results, the different stress mechanisms before and after cracking of the composite slab were analyzed. The research results can provide reference for the further study of the new combined slate and the identification and reinforcement of the existing slate floor.